Don't panic—your Excel isn't broken. If your column letters suddenly turn into numbers, you've stumbled into R1C1 mode. While it looks like a glitch, it's actually a high-level tool that lets you ...

An Excel macro is an abbreviation for macroinstruction—a sequence of commands (or directives) that tell a computer program or a programming language (such as Visual Basic, C, Assembler, PHP, etc.) to ...